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<div class="title">qwt_pixel_matrix.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/* -*- mode: C++ ; c-file-style: &quot;stroustrup&quot; -*- *****************************</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Qwt Widget Library</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (C) 1997   Josef Wilgen</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * Copyright (C) 2002   Uwe Rathmann</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * This library is free software; you can redistribute it and/or</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *****************************************************************************/</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#ifndef QWT_PIXEL_MATRIX_H</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#define QWT_PIXEL_MATRIX_H</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;</div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &quot;qwt_global.h&quot;</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;qbitarray.h&gt;</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &lt;qrect.h&gt;</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div><div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="class_qwt_pixel_matrix.html">   23</a></span>&#160;<span class="keyword">class </span>QWT_EXPORT <a class="code" href="class_qwt_pixel_matrix.html">QwtPixelMatrix</a>: <span class="keyword">public</span> QBitArray</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;{</div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;    <a class="code" href="class_qwt_pixel_matrix.html">QwtPixelMatrix</a>( <span class="keyword">const</span> QRect&amp; rect );</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;    ~<a class="code" href="class_qwt_pixel_matrix.html">QwtPixelMatrix</a>();</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    <span class="keywordtype">void</span> setRect( <span class="keyword">const</span> QRect&amp; rect );</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;    QRect rect() <span class="keyword">const</span>;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;    <span class="keywordtype">bool</span> testPixel( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y ) <span class="keyword">const</span>;</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    <span class="keywordtype">bool</span> testAndSetPixel( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">bool</span> on );</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    <span class="keywordtype">int</span> index( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y ) <span class="keyword">const</span>;</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    QRect d_rect;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;};</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;</div><div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="class_qwt_pixel_matrix.html#a0002dae3824ca4f7b09ecb65ffaaf93b">   50</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_pixel_matrix.html#a0002dae3824ca4f7b09ecb65ffaaf93b">QwtPixelMatrix::testPixel</a>( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y )<span class="keyword"> const</span></div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="keyword"></span>{</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">int</span> idx = <a class="code" href="class_qwt_pixel_matrix.html#ab76786bae3b4b28300b77ca09ad2ce1a">index</a>( x, y );</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keywordflow">return</span> ( idx &gt;= 0 ) ? testBit( idx ) : <span class="keyword">true</span>;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;}</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="class_qwt_pixel_matrix.html#a51c2ecd161c0c93dccb62fcf640ff280">   66</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="class_qwt_pixel_matrix.html#a51c2ecd161c0c93dccb62fcf640ff280">QwtPixelMatrix::testAndSetPixel</a>( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">bool</span> on )</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;{</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">int</span> idx = <a class="code" href="class_qwt_pixel_matrix.html#ab76786bae3b4b28300b77ca09ad2ce1a">index</a>( x, y );</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    <span class="keywordflow">if</span> ( idx &lt; 0 )</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">bool</span> onBefore = testBit( idx );</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    setBit( idx, on );</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    <span class="keywordflow">return</span> onBefore;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;}</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div><div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="class_qwt_pixel_matrix.html#ab76786bae3b4b28300b77ca09ad2ce1a">   85</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="class_qwt_pixel_matrix.html#ab76786bae3b4b28300b77ca09ad2ce1a">QwtPixelMatrix::index</a>( <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y )<span class="keyword"> const</span></div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="keyword"></span>{</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">int</span> dx = x - d_rect.x();</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    <span class="keywordflow">if</span> ( dx &lt; 0 || dx &gt;= d_rect.width() )</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;        <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">int</span> dy = y - d_rect.y();</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keywordflow">if</span> ( dy &lt; 0 || dy &gt;= d_rect.height() )</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    <span class="keywordflow">return</span> dy * d_rect.width() + dx;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;}</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="class_qwt_pixel_matrix_html_a0002dae3824ca4f7b09ecb65ffaaf93b"><div class="ttname"><a href="class_qwt_pixel_matrix.html#a0002dae3824ca4f7b09ecb65ffaaf93b">QwtPixelMatrix::testPixel</a></div><div class="ttdeci">bool testPixel(int x, int y) const</div><div class="ttdoc">Test if a pixel has been set. </div><div class="ttdef"><b>Definition:</b> qwt_pixel_matrix.h:50</div></div>
<div class="ttc" id="class_qwt_pixel_matrix_html_a51c2ecd161c0c93dccb62fcf640ff280"><div class="ttname"><a href="class_qwt_pixel_matrix.html#a51c2ecd161c0c93dccb62fcf640ff280">QwtPixelMatrix::testAndSetPixel</a></div><div class="ttdeci">bool testAndSetPixel(int x, int y, bool on)</div><div class="ttdoc">Set a pixel and test if a pixel has been set before. </div><div class="ttdef"><b>Definition:</b> qwt_pixel_matrix.h:66</div></div>
<div class="ttc" id="class_qwt_pixel_matrix_html"><div class="ttname"><a href="class_qwt_pixel_matrix.html">QwtPixelMatrix</a></div><div class="ttdoc">A bit field corresponding to the pixels of a rectangle. </div><div class="ttdef"><b>Definition:</b> qwt_pixel_matrix.h:23</div></div>
<div class="ttc" id="class_qwt_pixel_matrix_html_ab76786bae3b4b28300b77ca09ad2ce1a"><div class="ttname"><a href="class_qwt_pixel_matrix.html#ab76786bae3b4b28300b77ca09ad2ce1a">QwtPixelMatrix::index</a></div><div class="ttdeci">int index(int x, int y) const</div><div class="ttdoc">Calculate the index in the bit field corresponding to a position. </div><div class="ttdef"><b>Definition:</b> qwt_pixel_matrix.h:85</div></div>
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